Improved feed-water heater for steam-generators



' STATES ENOS B. JOHNSON, OF CHICAGO, ILLINOIS,

IMPROVED -'EED-VV-ATER HEATER FOR STEAM-GENERATORS.

Specification forming part o Letters Patent No. 99,573, dated February S, 1870 To a/ZZ whom it may concern,.-

Be it known that I, ENosv B. JOHNSON, of Chicago, in the county of Cook and State of Illinois, have invented a new and Improved FeedVater Heater; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawi1igs,for1ning part of this specification, in Which- Figure l represents a vertical longitudinal section of my improved feed-water heater. Fig. 2 is a vertical transverse section of the same, taken on theplane ofthe line x x,Fig.1.

Similar letters ol' reference indicate corresponding parts.

This invention relates to a new apparatus for heating the feed-water of steam-generators by means ofthe exhaust-steam for the purpose of utilizing the heat of thesteam.

The invention consists in the general arrangemet, in a water-chest, of detaining shelves and serpentine steam-pipes, all combined in such manner that the water ascending in the box will by the shelves be caused to take a circuitous course, following the windings of the steam-pipevhile thesteam enter# ing from above passes through the water and gives off its heat to the same. The water is by this apparatus rapidly and thoroughly heated, and fuel is economized, as almost the entire heat of the steam will be utilized.

A in the drawings represents a chest made of iron, of suitable size and shape. In its upper part is arranged a transverse steam-pipe,

extend in winding course through the chest to a lower transverse discharge-pipe, D.

or nearly horizontal shelves E E, which project alternately from opposite sides into the windings of the pipes C, as is clearly shown in Fig. l. The water to be heated enters the lower part ofthe chest at a, and escapes at I1 from the upper'end. "It rises as its becomes Warm. The steam enters thev pipe B' and passes through the pipes C into D, whence it escapes. rlhe steam, it will beobserved, enters the chest where the water escapes, and

ately before the water enters the boiler. The surplus heat ofthe Vsteam is then absorbed by the water in the lower part-of the chest. The

JOHN C. BARKER.

B, fromwhich a series of smaller pipes, C C, Y

Vithin the chest are also arranged horizontal gives Off the greatest quantity'of heat immedi- 

